Add 90/80 and 3/84
1st number: 1 10/80, 2nd number: 3/84
90/80 + 3/84 is 65/56.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 84 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 80 × 21 = 1680,
90/80 = 90 × 21/80 × 21 = 1890/1680 - Likewise, for the 2nd fraction, since 84 × 20 = 1680,
3/84 = 3 × 20/84 × 20 = 60/1680 - Add the two like fractions:
1890/1680 + 60/1680 = 1890 + 60/1680 = 1950/1680 - 1950/1680 simplified gives 65/56
- So, 90/80 + 3/84 = 65/56
In mixed form: 19/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/80+6/84 90/80+9/84 90/80+15/84 90/80+21/84